Sharepoint update metadata with Powershell problem with syntax? - powershell

Question

I am unable to update the date and capital letters on my sharepoint via powershella script. All the others work, only this one doesn't work.
Can you help me? I have been tired for several hours.
My sharepoint metadata:
My script for update metadata in Sharepoint.
Thank you so much for help

Answer 1

I tested DATA_AUDYTU as Date field, NAZWA_SIECI as Single Line Text field in my side with the sample code snippet below, it's working as expected:
#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\SharePoint Online Management Shell\Microsoft.Online.SharePoint.PowerShell\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\SharePoint Online Management Shell\Microsoft.Online.SharePoint.PowerShell\Microsoft.SharePoint.Client.Runtime.dll"
#Set parameter values
$SiteURL="https://Tenant.sharepoint.com"
$FileRelativeUrl="/doc2/test.txt"
Try {
#Get Credentials to connect
$Cred= Get-Credential
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
#Setup the context
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
$Ctx.Credentials = $Credentials
$File = $Ctx.web.GetFileByServerRelativeUrl($FileRelativeUrl)
$Ctx.Load($File)
$Ctx.Load($File.ListItemAllFields)
$Ctx.ExecuteQuery()
#Set Metadata of the File
$ListItem = $File.ListItemAllFields
$Listitem["NAZWA_SIECI"] = "TEST"
$Listitem["DATA_AUDYTU"]="12/24/2020"
$ListItem.Update()
$Ctx.ExecuteQuery()
Write-host -f Green "File's Metadata has been Updated Successfully!"
}
Catch {
write-host -f Red "Error Updating Metadata of the File!" $_.Exception.Message
}
Column details: